examples: discover should only wait on startup on baremetal, since macOS does not like that

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/discover/main.go

@@ -17,15 +17,13 @@
 package main
 
 import (
-	"time"
-
 	"tinygo.org/x/bluetooth"
 )
 
 var adapter = bluetooth.DefaultAdapter
 
 func main() {
-	time.Sleep(3 * time.Second)
+	wait()
 
 	println("enabling")
 

examples/discover/mcu.go

@@ -13,6 +13,11 @@ func connectAddress() string {
 	return deviceAddress
 }
 
+// wait on baremetal, proceed immediately on desktop OS.
+func wait() {
+	time.Sleep(3 * time.Second)
+}
+
 // done just blocks forever, allows USB CDC reset for flashing new software.
 func done() {
 	println("Done.")

examples/discover/os.go

@@ -16,6 +16,10 @@ func connectAddress() string {
 	return address
 }
 
+// wait on baremetal, proceed immediately on desktop OS.
+func wait() {
+}
+
 // done just prints a message and allows program to exit.
 func done() {
 	println("Done.")